Document re-encode checkbox.

diff --git a/doc/manual/dcpomatic.xml b/doc/manual/dcpomatic.xml
index f56c005d68bcd492acf2445ecedddd543bacdb53..69eff81383c797d0421819551010d13d1692d476 100644 (file)
--- a/doc/manual/dcpomatic.xml
+++ b/doc/manual/dcpomatic.xml
@@ -1868,6 +1868,17 @@ bandwidth can be between 50 and 250 megabits per second (Mbit/s).
 Most commercial DCPs use bit rates between 75 and 125 Mbit/s.
 </para>
 
+<para>
+<guilabel>Re-encode JPEG2000 data from input</guilabel> governs
+whether or not JPEG2000-encoded data from a piece of content (usually
+a DCP) will be re-used in the output data as-is or whether it will be
+decoded and re-encoded by DCP-o-matic.  If the option is enabled
+DCP-o-matic will decompress any JPEG2000 data it finds and re-encode
+it.  This is useful if you want to reduce the bitrate of a DCP.
+Usually you will achieve better quality and quicker results by leaving
+this option switched off.
+</para>
+
 <para>
 The <guilabel>Audio Channels</guilabel> control sets the number of
 audio channels that the DCP will have.  If the DCP has any channels